24) Endothermy A) is a characteristic of most animals. B) involves production of heat through metabolism. C) is a term equivalent to "cold-blooded." D) is only seen in mammals. E) is only seen in insects. 25) The body fluids of an osmoconformer would be ________ with its ________ environment. 26) Which of the following is true of ammonia? 27) Which part of the vertebrate nephron consists of capillaries?